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Week 12 – Chemical
Equations |
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| 1) Chemical Formula | Shows the number and kids of atoms in a molecule (Ex: H2O, or C6H12O6) |
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2) Chemical Equation |
A representation of a chemical reaction using formulas. It shows what is there in the beginning and what it turns into (Ex: CH4 +2O2 CO2 + 2H2O) |
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3) Product |
A compound or element that is the result of a chemical reaction. It’s what you end up with on the right side of the equation. |
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4) Reactant |
Substance(s) that exist before a chemical reaction takes place. It’s what you start with on the left side of an equation. |
| 5) Yield Sign | The arrow in the middle of a chemical equation that shows the direction of the change. It means produces or equals. |
| 6) Coefficient | The large number in front of a formula that shows how many of that molecule there are. It multiplies by the subscript. |
| 7) Subscript | A number below and to the right of a symbol, telling how many atoms of that element there are in that molecule. |
| 8) Compound | A substance containing two or more different
elements which are chemically combined.
It has different properties than the elements it’s made of. |
| 9) Molecule | The smallest part of a substance that still have the same properties of that substance. It is made up of more than one atom. |
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10) Composition |
Refers to the arrangement, type and number of atoms in molecules of chemical substances. |